They have been skating __________.
#40389
A
for three hours
B
since three hours ago
C
three hours ago
D
since three hours
推荐题目
------Where is your father?------He _______ Shanghai. He has ______ there for a week.
#39850
A
has gone to, gone
B
has been in, gone
C
has gone to, been
D
has been to, been
—— What are you doing? —— I _____ a letter to my pen pal.
#41497
A
write
B
am writing
C
writes
D
am write
